Steve and the entire Custom Mechanical team were outstanding to work with. From the very beginning, they gave me confidence that they fully understood the challenge and were thoughtful and strategic in determining the best way to address it.

Unfortunately, the HVAC system went out at a beach rental property, which obviously impacted our ability to rent the home and created inconvenience for guests. After I explained the urgency of the situation, Steve and his team made every effort to fit me in quickly and expedited the service call. Their communication was excellent throughout the entire process, and they worked seamlessly with my property manager to coordinate access to the property.

They also helped facilitate energy-saving credits and rebate programs, which was greatly appreciated. The new equipment looks fantastic, performs exactly as expected, and the overall communication from start to finish was exceptional.

While they may have been slightly more expensive than some other options, the added cost was well worth it for the level of expertise, professionalism, and confidence they provided. They clearly understood both the technical challenges and the equipment, committed to a tight and compressed timeline, and delivered on everything they promised.

I couldn’t be happier with the outcome and would highly recommend Custom Mechanical to anyone looking for a knowledgeable, reliable, and professional HVAC team.

Tanner came out to our home to "dewinterize" our home for the season.  He called ahead to give us an ETA, and was nice to deal with.  He did a thorough walk thru and examination.  We were pleased with the service we received.

Ryan was very knowledgeable about our heating system. Immediately after he finished we noticed a significant difference in the temperature. His professional mannerisms made us feel safe while he worked in our home. When completed he took the time to explain what he found, how he corrected the issues and how the system should function in its corrected state. We were very glad that we called Customer Mechanical and will recommend them to all of our friends

Gregory Smith was very knowledgeable, personable, and professional. He took his time with the repair and explained everything to me. I would trust him with any future work on my heat pump. A 5 star recommendation from me

Custom Mechanical came through with a short notice install of heat pump and air handler to beat 12/31/25 tax credit deadline.

Heather provided knowledgeable, insightful information in the proposal and estimate.  Heather and Lynn always cheerfully answered the phone and questions and kept the project moving.

Ed, Kenny and David worked hard in cold and windy conditions outside and cramped conditions in the attic.  Very experienced and knowledgeable and worked to test all functions of third party thermostat.  They respected our house and left the area clean.

All around great job and cheaper than other quotes.

1/20/26 — Custom Mechanical replaced second heat pump unit and associated air handler.  Same team of Ed, Kenny and David.  Same efficient and clean execution.

Thanks again!

...res April 1, 2026 Learn More → --> --> --> --> --> Proudly Serving Our Community Since 1981 --> --> $20 OFF --> Service or Repair --> --> --> We can help with flexible financing options!! --> --> -

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Delmarva's favorite furnace repair and plumbing contractor with free estimates & up-front pricing. Call now! Serving Frankford, Bethany Beach, Rehoboth Beach, Millville, Ocean View and surrounding areas.

Furnace Repair and Plumbing in Delmarva | Frankford, Bethany Beach, Rehoboth Beach

Excellent service from first inspection and estimates to the actual appliance installation.  Gabe Thomas was skilled, polite and friendly.  His plumbing installation was top-notch using the latest technology.  Our new water heater has worked flawlessly the past week.  I trust Jos Frederick & Sons to work at my home and will use their services in future as well as continuing my HVAC service contract.

Dave went the extra mile in providing multiple options for our furnace and A/C replacement. The install crew - Jake, Jake, and Omar - were among the most knowledgeable and well-trained techs I  have dealt with. Everything installed professionally and right the first time. Highly recommended.

Gabriel was professional, had clear communication and is highly competent. We had an issue that he quickly assessed and provided options. He performed his service and all works as expected. We were especially thankful he was willing to take our video call to discuss! Excellent technician! We were thankful for him to be able to come so quickly.

Until the service call last week, I heartily recommended this company. I can no longer be a supporter. The tech was nice, but came without the necessary adapter to check the refrigerant level in my two compressors. He used my hose, but broke off the water flow meter attached to it - and did not tell me. When presented with the bill, my charge was twice as much as last year so I paid $332 for a one hour  service call, which is about double what I paid last year!!! I expressed my dissatisfaction to the tech. I have yet to hear back from the company. Life must be bounteous at Joseph Frederick and they obviously do not need my business. So, they will not and I surely will not recommend them.

Came out same day and installed a hot water heater. Great/ professional service. Would go with them again in a heartbeat

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Joseph Frederick & Sons if a full-service HVAC, plumbing, and electrical company located in Wilmington, DE. We service Newark, DE, and the Delaware Valley.

Joseph Frederick & Sons | Heating, AC, Plumbing, Electrical

Amazing service.  Contacted these guys because my HVAC wasnt blowing hot air after my basic troubleshooting.  House was 61 degrees and getting colder.  "Jim" dispatched a guy and in a short period "Carey" showed up.  He was nice, polite and fixed my issue ASAP and explained everything.  My 3 kids and Wife won't be sleeping in the cold tonight!  Def. recommend.

From the moment I contacted them when I noticed my air conditioner was not working the customer experience with them was phenomenal. They are family owned company who ensures their communication with the customer is seamless and runs smoothly. They came on the day they set up the appointment between the hours they scheduled me, Ray the technician looked at my unit showed my husband it was leaking explained exactly what was occurring with the unit. Gave us two options his was very knowledgeable and his opinion In the direction we need to go. He came on Monday later in the day, we got our proposal on Tuesday and by Thursday Matt and TJ were installing our new unit they were very personable and knowledgeable. Sabrina in the office was wonderful to work with as she keeps  you updated throughout the steps from the proposal all the way to the installation and even followed up when it was done. I would recommend anyone sho needs a unit to support George H Burns for all your AC and Heating needs.

My A/C was not cooling and leaking from the inside unit.  George H Burns sent someone within 24 hours and fixed my A/C.   The service man was very professional and great service.

Thank you Norm!  I was very pleased with the whole experience and process of working with you and your team.  Your quick response to my request for an estimate to replace our aging furnace was just the beginning of your excellent service.  You offered a very reasonable cost for a range of options, and worked with me to chose the one that best fit my needs.  The install team was prompt, neat and courteous.  The end result was a very professional install and the unit works wonderfully.  I would recommend anyone in the area to talk to you before selecting an HVAC contractor.  Thanks again!

~James

Driving on Lancaster Ave in rush hour traffic (1/12 7:30ish) light rain the driver of this van Accelerated and cut me off from the right lane. I had to slow down and stop from being hit.  I could see him make two more aggressive Lane changes

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